We use images everyday and there are hundreds of image formats applied in different walks of life or work. JPG, working as the most web friendly image format, is the one we read, write and share on a daily base. Therefore, we always have the requests to convert an image to JPG.

Here we will look at 6 ways to convert image to JPG, while compress the JPG to 20KB, 40KB or 50KB as you like basing on the original image file size. Also, you can find free tools to convert any photo to JPG on your Mac or Windows.

How to Batch Convert Image to JPG 20/40/50KB As You Like

It is easy to convert a photo to JPG format, but taking the hassle out of making the JPG in small size, like 20KB, 40KB or 50KB, nabbing a robust program is the best way saving us from ending up on the hands and wasting our time. BatchPhoto Pro and Pixillion Image Converter are the option we’ve got for you, and we promise they are easy and useful.

BatchPhoto Pro—Batch Convert Any Image to JPG in 20KB, 40KB, 50KB, 200KB, etc

BatchPhoto Pro from Bits&Coffee is an all-round image converter, it supports inputting and outputting the most image types on the market, including common and raw files, up to 170 types. Besides, it adds a basic editing feature to crop, rename, resize, rotate, add watermark/filter, touch-up, etc, which makes it possible to keep your JPG file approx. 20KB, 40KB or 50KB, any size you want.

Also, as you can know from its product name, batch processing is, hand down, its best feature to make it extremely useful. In reality, we do need an image converter to do batch work, because we often have to convert more than one image at the same time.

BatchPhoto Pro Image to JPG Converter Standout Features

  • Read virtually all types of image, common, raw, etc.
  • Convert common and raw image to JPG or other formats: png to eps, pdf to eps, svg to jpg
  • Batch convert
  • Preserve original quality
  • Bulk resize and rename images
  • Edit images: crop, add effect, rotate, change DPI, replace color, add watermark, comment, add frames or border, etc
  • Upload and share image to FTP or social accounts

How to Batch Convert Any Image to JPG 20KB or 50KB?

  1. Grab a copy of BatchPhoto Pro, install and open the application.
  2. Click Add Photos, drag and drop all your images to the program.add image to batchphoto
  3. Go to Setup, choose output folder and select output format as JPG.choose output as jpg
  4. Then click Process to batch convert image to JPG.
  5. Finally, re-add those JPG files that larger than 20KB or 50KB to BatchPhoto Pro, select them all, go to Edit Photos>Add Filters>Resize>adjust Resize parameters>OK, the Resize filter will be added to the left column, select it and go to Setup, choose output as JPG, then click Process the resize procedure. All the JPG files will be kept within 20KB or 50KB.resize in batchphoto


Also, you can upload all images for one time, select them all and add the resize filter, choose output and process at one time. But this may cause JPG files that are in your wanted size finally saved with poor-quality.

Pixillion Image Converter—Easiest Way to Batch Convert Any Image to JPG 20KB or 50KB

Pixillion Image Converter from NCH Software is a well-regarded image converter to do conversion easily. It supports reading 50+ image formats, from common images to raw images. And it offers extended features too, like rotate, resize, customize output settings, etc. We can use the Resize feature to compress JPG images under 20KB, 40KB, or 50KB basing on the original file size.

Pixillion Image Converter Standout Features

  • Read 50+ image formats, including raw images
  • Convert images to 20 different formats, including JPG
  • Batch process conversion
  • Resize, flip, rotate, add watermark text/image
  • Share
  • Allow output preferences

How to Batch Convert Any Image to JPG 20KB or 50KB?

  1. Grab a copy of Pixillion Image Converter ,install and open the application.
  2. Drag and drop all images to the program.convert image to jpg pixillion
  3. Choose output folder and set output as JPEG.convert image to jpg pixillion 02
  4. Then go to Compression Settings, choose from low or high image quality.pixillion compression
  5. (Alternatively)You can click Resize and scale your JPG to 20KB or 50KB in different resize options, continue with OK.pixillion resize
  6. Click Convert to turn your all your images to JPG.

Best Free Image Converter to JPG 20KB, 50KB, 200KB

With more users requiring converting images to JPG format, the technology behind this is constantly getting better and finally offered as free. There are open source and built-in free image converter to JPG for our Mac and Windows machine.


Preview the free image reader for macOS, it can open and read PDF, BMP, PNG, JPG, DNG, EPS, GIF, ICO, PSD, OpenEXR, Tiff and raw images. If you are a mac user and not going to convert some uncommon images, you can use Preview, it also allows users to compress the JPG output, making it within 20KB or 50KB.

The Bad

  • No Batch Conversion
  • Limited support for image input

Follow the Steps to Convert Image to 20KB or 50KB JPG Free with Mac Preview

  1. Open image with Preview.
  2. Go to File>Export.convert image to jpg preview
  3. Choose JPEG as the output format, adjust the image quality until you get the JPEG under 20KB or 50KB, the file size will be showed accordingly.convert image to jpg preview 02 22
  4. Then hit Save to convert image to jpg on mac free and keep it small in size.

Windows Photos

For Windows users, Paint, the free image tool to open, convert, edit and resize images, is the perfect solution, if you don’t need a batch feature that is absent from Paint.

The Bad

  • No Batch Conversion
  • Limited support for image input
  • Need to convert first, then upload JPG files for resize again

Steps to Convert Image to JPG in 20KB or 50KB on Windows Free

  1. Open image with Paint.
  2. Go to File>Save As>JPEG.
  3. Reopen the created JPEG files with Paint.
  4. Go to Resize, adjust the resize settings.
  5. Click OK to resize the JPEG files on Windows for free.


GIMP stands for GNU Image Manipulation Program, the program is totally free. GIMP is a cross-platform image editor with conversion feature, working on macOS, Windows, Linux. It is designed with advanced tools and allows sophisticated image users to edit their image professionally, just like editing in Adobe Photoshop. If you just want to use it as an image to JPG converter, it will be an easy job even with this tool.

The Bad

  • No batch image conversion
  • Need longer time to fire up the program
  • Slowly responsive
  • Need to convert first, then upload JPG files for resize again

Steps to Convert Any Image to JPG and Keep it 20KB~200KB

  1. Install GIMP.
  2. Open image in GIMP.webp to jpg 01
  3. Go to File>Export As.webp to jpg gimp02
  4. Choose output as JPEG, click Export to convert image to JPEG format.webp to jpg gimp 03
  5. Then re-import the JPEG file to GIMP.
  6. Go to Image>Scale Image.resize in gimp01
  7. Adjust the scale settings and click Scale to resize the JPEG output.resize settings gimp
  8. Finally, go to File>Save, to convert your image to JPG in 20KB,  50KB, or 200KB.

Best Online Any Image to JPG Converter in KB

Our internet is full of online free tools to convert an image to JPG too, here we think image.online-convert is the most trustworthy online free too.

The Good

  • Convert 17 image formats to JPG
  • Export images as 12 different image formats
  • Batch convert images
  • Upload images from computer, URL, Dropbox, Google Drive
  • Compress images
  • Choose image quality/size/color/DPI
  • Crop images
  • Enhance images

The Bad

  • Take time to batch process images
  • Limited image file size: Max 100 MB per image
  • Files are stored online for a while
  • Compression won’t work sometimes

Follow the Steps to Batch Convert Any Image to JPG in KB Online Free

  1. Head to image.online-convert in your web browser.
  2. Drag and drop all your images to the online program.online free image to jpg01
  3. Go to Optional settings and choose quality settings. To convert image to jpg 20KB, choose Best Compression from the Quality Settings menu; to convert image to jpg 200kb, choose Medium from the Quality Settings menu. (You can leave the Compress option as None when selecting quality settings).online free image to jpg 02
  4. Click Start conversion to convert image to JPG.
  5. Then download the JPG files to your local folder.

We Promise Converting Image to JPG is Simple

Converting image to JPG is not a high-tech issue, it is simple and we can easily nab a tool, even free to convert it. But the best bet to convert any image to JPG and keep the size under 20KB, 40KB, 50KB or any wanted smaller file size, the closest option our user should have for is to try the tools we recommend to you.